Alternative wireless telephone roaming using prepaid services

ABSTRACT

A method and system are provided for registering and operating a wireless telephone in a roaming service area in which the wireless telephone is not registered for roaming services. When a wireless telephone is operated in a such a roaming service area, the roaming service provider whose services the wireless telephone must utilize in order to operate in the roaming service area informs the user of the wireless telephone through a recorded or live message that the wireless telephone may be used in the roaming service area if the user of the wireless telephone purchases and uses a prepaid utilization account offered by the roaming service provider. If the user purchases a prepaid card and loads a balance into a prepaid utilization account, a prepaid services system of the roaming service provider establishes a pseudo-telephone number for use by the wireless telephone in the roaming service area. The user&#39;s home service provider is notified that all calls directed to the user&#39;s permanent wireless telephone number should be forwarded to the pseudo-number assigned to the wireless telephone. After this registration process is completed, calls may be placed to and from the wireless telephone in the roaming service area, and billing for those calls will be directed to the prepaid utilization account purchased by the user.

FIELD OF THE INVENTION

This invention relates to a system and method for utilizing prepaidservices in a wireless telephone network for allowing use of a wirelesstelephone in an area in which the wireless telephone is not registeredfor roaming services.

BACKGROUND OF THE INVENTION

In a typical wireless telecommunications system, users of wirelesstelephones subscribe to the services of a given wireless servicesprovider for use of their wireless telephone in prescribed serviceareas. When the wireless telephone is operated outside the prescribedservice area, the telephone enters into a roaming mode whereby it mustuse the wireless services of a services provider other than its homeservice provider. Typically, wireless service providers enter intoagreements with other wireless service providers to allow theircustomers to use the services of other service providers when theircustomers are roaming in service areas outside their home service area.As a part of such agreements, information required to verify thelegitimacy of the wireless telephone and information required for callprocessing for that wireless telephone is passed from the home serviceprovider for the wireless telephone to other service providers withwhich the home service provider has roaming service agreements.Information supplied to potential roaming service providers includes thewireless telephone directory number and the mobile identification numberfor the wireless telephone.

Accordingly, when the user of the wireless telephone roams from her homeservice area to a roaming service area and attempts to send or receivecalls, a wireless switch in the roaming service area will detect thecall, verify that the wireless telephone may use the services of theroaming service provider in accordance with the services agreementbetween the telephone's home service provider and the roaming serviceprovider, and the wireless telephone call will be processed. In order tofacilitate call processing, a home location register (HLR) of theroaming service provider contacts the home location register of the homeservice provider for any additional information needed for callprocessing including information required for billing associated withthe call. Billing records associated with a call are typically generatedat the switch or billing system of the roaming service provider and aresubsequently forwarded back to the home service provider of the wirelesstelephone. The wireless provider compensates the roaming serviceprovider for its services and bills the user of the wireless telephonefor usage in the roaming service area.

A problem exists, however, when the user of the wireless telephoneattempts to use the wireless telephone in a roaming service area inwhich the user's home service provider has no roaming service agreementsin place with service providers in the roaming service area. Thisproblem is particularly prevalent when wireless customers travel toforeign countries where there are few if any reciprocal serviceagreements between local wireless service providers and wireless serviceproviders of the user's home country. When the user of the wirelesstelephone attempts to use the telephone in such an area, the wirelesstelephone will be registered on a local wireless switch in the roamingservice area as an invalid subscriber because information necessary toidentify the wireless telephone and process the call will not have beenstored on that switch due to the absence of a roaming service agreement.Accordingly, the user will not be able to send and receive calls in thatroaming service area.

Therefore, there is a need in the art for a method and system forallowing a wireless telephone to temporarily register and operate in aroaming wireless service area in which the wireless telephone is nototherwise registered to operate.

SUMMARY OF THE INVENTION

In accordance with the present invention, the above and other problemsare solved by a method and system for registering and operating awireless telephone in a roaming service area in which the wirelesstelephone is not registered for roaming services. When a wirelesstelephone is operated in a such a roaming service area, the roamingservice provider whose services the wireless telephone must utilize inorder to operate in the roaming service area informs the user of thewireless telephone through a recorded or live message that the wirelesstelephone may be used in the roaming service area if the user of thewireless telephone purchases and uses a prepaid utilization accountoffered by the roaming service provider. If the user purchases a prepaidcard and loads it into the utilization account, a prepaid servicessystem of the roaming service provider establishes a pseudo-telephonenumber for use by the wireless telephone in the roaming service area.The user's home service provider is notified that all calls directed tothe user's permanent wireless telephone number should be forwarded tothe pseudo-number assigned to the wireless telephone. After thisregistration process is completed, calls may be placed to and from thewireless telephone in the roaming service area, and billing for thosecalls will be directed to the prepaid utilization account purchased bythe user.

These and other features and advantages, which characterize the presentinvention, will be apparent from a reading of the following detaileddescription and a review of the associated drawings. It is to beunderstood that both the foregoing general description and the followingdetailed description are exemplary and explanatory only and are notrestrictive of the invention, as claimed.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a pictorial diagram representing the system architecture of anexemplary embodiment of the present invention.

FIG. 2 is a block diagram of a telecommunications network illustratingan exemplary embodiment of the present invention.

FIGS. 3 and 4 are flow diagrams illustrating a method for temporarilyregistering and using a wireless telephone in a roaming service areautilizing prepaid services.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

The following description of an exemplary embodiment of the presentinvention is made with reference to the above-described drawings whereinlike numerals refer to like parts or components throughout the severalfigures. The present invention is directed toward a method and systemfor registering and operating a wireless telephone in a roaming servicearea in which the wireless telephone is not registered to operate, forexample, when wireless service provider of the wireless telephone doesnot have agreements in place to allow use of the wireless telephone inthe roaming service area.

Referring to FIG. 1, when a wireless telephone 55 is operated in aroaming service area in which the wireless telephone is not registeredto operate, a wireless call attempt is transmitted through an antennasystem 67 to a wireless service switch 57 where it is determined thatthe wireless telephone is not registered for service in the roamingservice area. According to an exemplary embodiment of the presentinvention, the wireless service switch 57 signals an alternative roamingvia prepaid utilization (ARPU) system 95 operated by the roaming serviceprovider whose services the wireless telephone 55 must utilize in orderto operate in the roaming service area. In response, the ARPU 95 informsthe user of the wireless telephone 55 through a recorded or live messagethat the wireless telephone 55 may be used in the roaming service market90 if the user of the wireless telephone 55 purchases a prepaid card andloads it into a utilization account.

If the user of the wireless telephone 55 purchases a prepaid card andloads it into a prepaid utilization account, the ARPU system 95 directsthe prepaid services system 80 of the roaming service provider toestablish a pseudo-telephone number for use by the wireless telephone 55in the roaming service area 90. The ARPU system 95 then notifies thehome service provider of the user's home service market 85 that allcalls directed to the user's actual wireless telephone directory numbershould be forwarded to the wireless telephone 55 at the pseudo-numberassigned to the wireless telephone 55. After this registration processis completed, calls may be placed to and from the wireless telephone 55in the roaming service area 90, and billing for those calls will bedirected to the prepaid utilization account assigned to the user.Preferred implementation of the foregoing system and method aredescribed in detail below with reference to FIGS. 2, 3 and 4.

Exemplary Operating Environment

It is advantageous to describe an exemplary operating environment inwhich the current invention may reside. FIG. 2 is a block diagramillustrating components of a telephone network that provides anexemplary operating environment for the present invention. Referring nowto the drawings, in which like numerals represent like elementsthroughout the several figures, aspects of the present invention and theadvanced intelligent network (AIN) and an integrated wireless networkwill be described.

The modern public switched telephone network (PSTN) has separatesignaling paths for voice signals (or other customer-utilizedcommunication circuits) and for control signals, which includeinformation transmitted throughout the network to control the connectionand disconnection of the voice circuits. The public switched telephonenetwork that evolved in the 1980s incorporated the advanced intelligentnetwork (AIN). Some of the components of the advanced intelligentnetwork are illustrated in FIG. 2. FIG. 2 is a block diagramrepresenting at least a part of the advanced intelligent network (AIN)100 of a typical local exchange carrier integrated with components of awireless network 150. The advanced intelligent network (AIN) uses thesignaling system 7 (SS7) network for signal or system control messagetransport. The components thereof are well-known to those skilled in theart. The operation of many of the components of the advanced intelligentnetwork is also described in U.S. Pat. No. 5,245,719 to Weisser entitled“Mediation of Open Advanced Intelligent Network Interface by SharedExecution Environment” which is incorporated herein by reference. TheSS7 communications protocol is provided in the document entitled “BellCommunications Research Specification of Signaling System 7,” DocumentTR-NWT-000246, Issue 2 (June 1991), plus Revision 1 (December 1991),which is also incorporated herein by reference.

A plurality of central offices are provided in a typical public switchedtelephone network. As shown in FIG. 2, each central office may includean electronic switch known to those skilled in the art as a serviceswitching point (SSP). These are indicated in FIG. 2 as SSP switches 12and 14. The number of SSP switches depends on the number of subscribersto be served by the public switched telephone network. An SSP is the AINcomponent of a typical electronic central office switch used by a localexchange carrier. The terms “SSP” and “switch” are used interchangeablyhereinafter and are understood to refer to a telecommunications switchhaving AIN capability and which may be utilized for connecting voicechannel circuits, including voice channel lines, such as trunk circuits30 and 32.

As shown in FIG. 2, central offices switches (SSP) 12 and 14 have aplurality of subscriber lines 18 and 20 connected thereto. Each of thesubscriber lines 18 and 20 is connected to a terminating piece or piecesof customer premises equipment that are represented by telephones 21 and24. SSP switches 12 and 14 are connected by a plurality of trunkcircuits 30. These are the voice path trunks that interconnect thecentral offices 12 and 14 and over which calls are connected whencompleted.

Each piece of terminating equipment in the PSTN is preferably assigned adirectory number. The term “directory number” is used herein in a mannerconsistent with its generally understood meaning of a number that isdialed or input by an originating party at an originating station toreach a terminating station associated with the directory number. Adirectory number, typically a ten digit number, is commonly referred toas a “telephone number” and may be assigned to a specific telephoneline, such as the telephone line 18 shown in FIG. 2.

Much of the intelligence, and the basis for many of the enhancedfeatures of the network, resides in the local AIN service control point(SCP) 42 that is connected to signal transfer point 34 via SS7 data link44. As is known to those skilled in the art, AIN service control points,such as SCP 42, are physically implemented by relatively powerful faulttolerant computers. Among the functions performed by the service controlpoints is maintenance of network databases used in providing enhancedservices. Service control points, such as SCP 42, normally implementhigh volume routing services, such as call forwarding and 800 numbertranslation and routing. They are also used for maintenance of andproviding access to high volume databases for authorization of billing,such as credit card number validations. In most local exchange carriernetworks, service control points are only used for data base look up androuting services that take place prior to the logical completion of thecall, i.e., the provision of a ringing signal to the called subscriberline and ring back to the calling subscriber.

Additional devices for implementing advanced network functions withinthe AIN 10 are provided by regional STPs (not shown), regional SCPs (notshown), and a service management system (SMS) 46. The STP 34 isconnected to the SSPs via connections 36, 38 and 40. Both the regionalSCPs and the local SCP 42, which represent a plurality of local SCPsdistributed throughout the AIN 10, are connected via respective datalinks to the SMS 46. The SMS 46 provides a centralized platform forremotely programming the various SCPs of the AIN 10 so that acoordinated information processing scheme may be implemented for the AIN10. The SMS 46 is implemented by a large general purpose computer andinterfaces to business offices of the local exchange carrier andinterexchange carriers. SSPs download, on a non-real time basis, billinginformation to a billing system 50 that is needed in order toappropriately invoice subscribers for the services provided.

The SCP 42 is also connected to a caller name (CNAM) database 48. TheCNAM database comprises a plurality of directory numbers along withassociated names for the directory numbers. The CNAM database may beused to provide a look-up database to provide caller ID service. TheCNAM database may comprises directory numbers from wireline customers aswell as wireless customers of wireless network 150.

In operation, the intelligent network elements of the AIN 100, asdescribed above, communicate with each other via digital data messagestransmitted over the network of digital data links. An SSP may beconfigured to interface with these network elements through the use of atrigger. A trigger in the network is an event associated with aparticular subscriber line or call that causes the SSP to generate adata packet message to be sent to a service control point. In order tokeep the processing of data and calls as simple and generic as possibleat central office switches, such as SSP central office switches 12 and14, a relatively small set of triggers are defined at the SSP centraloffice switches for each call.

The message created by an SSP in response to a trigger is known as a“query” message. A query message opens a “transaction” and the SSPgenerally holds the communication until it receives a reply from anappropriate network element via the network of digital data linksinstructing the SSP 12 to take a certain action. If the SSP 12 receivesno instructions within a certain amount of time, the SSP “times-out” andexecutes a default task for the communication. The reply to the querymessage may be a “conversation” message or a “response” message.Conversation messages allow for bidirectional exchanges between networkelements while the transaction remains open. A “response” message closesthe transaction opened by the query message, and usually instructs theSSP to route the held communication for connection with a terminatingstation. Query messages, conversation messages, and response messagesare standard types of messages defined by the AIN protocol. The detailsof the AIN protocol are well-known to those skilled in the art and willnot be further described herein. For more information regarding the AINprotocol, see Bellcore Specification GR-1298-CORE Switching SystemsGeneric Requirements for AIN 0.1, which is incorporated herein byreference.

The wireless network 150, such as a cellular network, comprises a mobileswitching center (MSC) 52. The MSC 52 is a switch providing services andcoordination between wireless user in network 150 and external networks.The MSC 52 may be connected to STP 34 to provide information to thewireline network and receive information from the wireline network. TheMSC 52 also communicates with a wireless subscriber, such as wirelesstelephones 54 and 55. For preparation of billing, the MSCs create calldetail records (CDR) similar to the above-described AIN SSPs. The calldetail records created by the MSCs are transmitted to the billing system50 for preparation of periodic wireless subscriber billing.

The signaling protocol used between the components of the wirelessnetwork 150 is well known to those skilled in the art. An exemplarysignaling protocol is the interim standard 41 (IS-41). The IS-41standard defines the processed by which wireless provider accomplishsignaling between the MSCs and other devices for purposes of intersystemhandoff and automatic roaming. For purposes of caller identificationinformation, as described with reference to an exemplary embodiment ofthe present invention, the IS-41D standard is utilized to addressvarious features such as calling name ID, enhanced 911, and lawenforcement intercept. Operation of the IS-41 signaling protocols iswell known to those skilled in the art.

The MSC 52 may also be connected to a home location register (HLR) 56.The home location register 56 is a wireless telecommunicationscomponent. The HLR 56 is a permanent SS7 database used in cellularnetworks including the advanced mobile phone system, the global systemfor mobile communications and the PCS or personal communications system.The HLR 56 may be located as a separate component as illustrated in FIG.2, or the HLR 56 may be resident on the SCP 42 of the cellular providerof record. The HLR 56 may be used to identify and verify a subscriber,including caller identification information such as name and wirelesstelephone number of the subscriber. The HLR 56 also contains subscriberdata related to features and services subscribed to. The HLR 56 is usednot only when a call is being made within an area of coverage supportedby a given wireless provider, it may also be used to verify thelegitimacy and features subscribed to by a given use when the user isroaming outside that area. Under roaming conditions, a local serviceprovider may query the HLR 56 of another wireless telecommunicationsservice provider via an SS7 data link. Once information on thesubscriber is verified. Data on the subscriber may be transferred viathe SS7 line to the HLR 56 of the local service provider in which thesubscriber is roaming.

As illustrated in FIG. 2, a roaming HLR 60 is shown connected to awireless switch 57 and wireless telephone 55. The wireless switch 57 isfunctionally connected to a prepaid services system 80 and aninteractive voice response unit 75. The roaming HLR 60 and associatedtelecommunications components is illustrative of wirelesstelecommunications components of a wireless service provider located ina roaming area relative to a user's home service provider. The HLR 56and related components such as the MSC 52 and wireless telephone 54 areillustrative of wireless telecommunications components of the wirelesstelephone user's home service provider. As shown in FIG. 2, the roamingHLR 60 and related components may communicate with the HLR 56 of theuser's home service provider via a conventional telecommunicationsnetwork 70 over data links 65.

The interactive voice response (IVR) 75 is a well known component forallowing the retrieval and processing of information by telephone. TheIVR 75 may be used to retrieve information needed for call processing orimplementation of call features through receipt of information via atelephone keypad or via human voice interaction. For example, the IVR 75may be utilized to present a number of options to a user oftelecommunications services followed by a receipt and storage ofresponses from the user. For example, the user may be asked to press orsay “1” if the user desires option “1,” or press or say “2” if the userdesires option “2”.

The prepaid services system 80 may be comprised of a combination ofcomputer hardware and software for controlling prepaidtelecommunications services. The prepaid services system 80 may beresident at a switch such as the MSC 57, or the prepaid services system80 may be operated at an SCP 42 or as a stand-alone system. In a typicalprepaid services system, a user of telecommunications services purchasesa set amount of prepaid services such as sixty minutes of telephonetime. When a user of the prepaid services places a call to be charged tothe prepaid account, the switch processing the user's telephone callsignals the prepaid services system 80 for instructions. If the user'sprepaid account contains sufficient prepaid balance to complete thecall, the prepaid services system 80 signals the switch to complete thecall as directed by the user. The prepaid services system 80 also servesas a stand-alone billing system in that it tracks in real time theuser's exhaustion of his/her prepaid account. Once the prepaid accountis fully exhausted, the user is invited to purchase additional services,or call processing is terminated.

Operation of an Exemplary Embodiment

Having described an exemplary operating environment and the systemarchitecture of the present invention with reference to FIGS. 1 and 2,FIGS. 3 and 4 are flow diagrams illustrating a method for temporarilyregistering and using a wireless telephone in a roaming service areautilizing prepaid services. A method 300 is described with reference toFIGS. 1-4, and for purposes of the exemplary call flow, assume that auser of a wireless telephone attempts to send and receive telephonecalls in a roaming service area in which the user's wireless telephoneis not registered for roaming services.

The method 300 begins at step 305 and proceeds to step 310 where a userattempts to place a call via his wireless telephone 22 in a roamingservice area in which the wireless telephone is not registered forroaming services. For example, the wireless telephone may be located ina foreign country in which the user's home service provider does nothave roaming service agreements in place. At step 315, the call attemptfrom the wireless telephone 55 is received at the wireless switch 57 forcall processing. At the wireless switch 57, a database look up isperformed to locate roaming service information related to the wirelesstelephone 55. If necessary, the wireless switch 57 may signal theroaming HLR 60 for additional information to determine whether thewireless telephone 55 is registered for service within the roamingservice area in which the wireless telephone 55 is located. Because thewireless telephone 55 is not registered for service, the roaming HLR 60and/or the wireless switch 57 determine that the wireless telephone 55is an invalid subscriber for services in the roaming service area.

At step 320, the wireless switch 57 signals the alternative roaming viaprepaid utilization system (ARPU) 95 of the wireless service providerthrough which the wireless telephone 55 is attempting to operate, andthe ARPU 95 directs the IVR 75 to provide the user of the wirelesstelephone 55 with a number of options to assist the user in utilizationof the wireless telephone 55. The ARPU 95 is a combination of hardwareand software operated by the roaming service provider for providing useof the roaming service provider's wireless telecommunications serviceswhile the user is in the roaming service area. The ARPU 95 may beresident in any suitable component of the roaming service provider'stelecommunications system, including the HLR 60, the MSC 57, the prepaidservices system 80, or at an SCP, such as the SCP 42, illustrated inFIG. 2.

At step 325, in response to instructions from the ARPU 95, the IVR 75provides a number of options to the user of the wireless telephone 55through the wireless switch 57. For example, the IVR 75 may play arecorded announcement to the user of the wireless telephone 55 such as“Welcome to the roaming service provider network. Your home serviceprovider is not connected with this network. If you would like to useyour wireless telephone in this area, you may load a prepaid servicescard or you may purchase wireless telephone time using a credit card.”The announcement may then provide the user with a set of options, forexample, “Press ‘1’ to find a distribution center to purchase a prepaidservices card, press ‘2’ if you have a card and would like to load it atthis time, or press ‘3’ if you would like to speak with a servicerepresentative.” Such voice announcements are exemplary only and mayvary with the scope of services offered to the user by the roamingservice provider.

At step 330, the user having purchased a prepaid services card loads theprepaid services card information into the prepaid system using thewireless telephone 55 in response to prompts provided by the IVR 75. Asshould be understood by those skilled in the art, other methods ofpayment for the wireless telephone services may include credit cards,promotional credit vouchers and other normally accepted forms ofpayment. At step 335, the IVR 75 forwards receipt of the prepaidservices card or other payment method to the ARPU 95 and assigns apseudo-telephone number to the wireless telephone 55 and registers thewireless telephone 55 at the HLR 60 and prepaid services system 80. Thewireless telephone 55 is now registered as a valid subscriber of thewireless services of the roaming services provider as a function of theprepaid services purchased by the user and administered by the prepaidservices system 80.

At step 340, the ARPU 95 through the roaming HLR 60 notifies the HLR 56of the wireless telephone's 55 home service provider. Notification ofthe home service provider of the wireless telephone 55 includesinstructions to the home service provider that all calls directed to thepermanent telephone number of the wireless telephone 55 should beforwarded directly to the pseudo-number assigned to the wirelesstelephone 55 for operation in the roaming service area 90.

Referring now to FIG. 4, after the wireless telephone 55 is registeredin the roaming service area, the user is ready to send and receivewireless telephone calls. At step 345, a determination is made as towhether the user has any outgoing calls to be placed. If yes, the methodproceeds to step 355 and the user places a call using the wirelesstelephone 55. At step 365, the wireless switch 57 receives the callattempt signal from the wireless telephone 55 and verifies with theroaming HLR 60 that the wireless telephone 55 is registered to placetelephone calls in the roaming service area. Based on the pseudo-numberassigned to the wireless telephone 55 and other identifying informationprovided by the wireless telephone 55 during the registration process,the switch recognizes the wireless telephone 55 as a subscriber to theprepaid roaming service.

At step 370, the switch 57 signals the prepaid services system 80 forcall processing. At step 375, a determination is made as to whether thewireless telephone 55 has sufficient prepaid services to complete thecall placed by the user. If insufficient prepaid services remain in theuser's prepaid account, for example, the user has used all prepaidwireless telephone minutes, the method proceeds to step 380 and the callattempt is terminated. If at step 375 the determination is made by theprepaid services system 80 that the user's account has sufficientprepaid services to complete the call, the method proceeds to step 385,and the call is completed based on the telephone digits dialed by theuser. The method ends at step 390.

According to an exemplary embodiment, the prepaid services system 80monitors the user's prepaid services on a real-time basis. That is, ifthe user has five minutes of prepaid wireless telephone time remainingwhen the call is completed at step 385, the call will be terminated atthe exhaustion of the five minutes of remaining time. Alternatively, theuser may be offered the opportunity to purchase additional prepaidservice time before the call is terminated.

Returning back to step 340, if a determination is made that the user hasno outgoing calls, the method proceeds to step 350, and a determinationis made as to whether the user has any incoming calls directed to thewireless telephone 55. If not, the method proceeds to step 390 and ends.If yes, the method proceeds to step 360 and the wireless switch 57receives a call forwarded from the user's home service area, asdescribed above. Alternatively, the user may receive calls dialeddirectly to the pseudo-number if the user has notified callers of theavailability of that number. Upon receiving a call, the method proceedsto step 365, and call processing proceeds as described above.

When the user of the wireless telephone 55 leaves the roaming servicearea and returns to the user's home service area, or when the usertravels to a roaming service area in which he has prearranged roamingservices, the HLR 56 of the home service area or roaming service areawill detect the user's wireless telephone 55 when that telephone ispowered on or when a call attempt is made. When the HLR 56 recognizesthe wireless telephone 55 as a telephone that is registered for servicesin that service area, the HLR 56 will delete the instruction to forwardincoming calls to the pseudo-number provided to the wireless telephone55 in the roaming service area 90. Likewise, if the user returns to anarea in which the wireless telephone 55 is not registered for service,the above-described process may be repeated to obtain wireless telephoneservices on a prepaid basis.

As described, a system and method are provided for enabling roamingservices for wireless telephones in roaming service areas in which thewireless telephones are not registered for service. It will be apparentto those skilled in the art that various modifications or variations maybe made in the present invention without departing from the scope orspirit of the invention. Other embodiments of the invention will beapparent to those skilled in the art from consideration of thespecification and practice of the invention disclosed herein.

1-24. (Canceled)
 25. A method of enabling use of a wireless telephone ina roaming service area using prepaid services, comprising: determiningthe wireless telephone is not registered for wireless services in theroaming service area; receiving prepaid roaming services accountinformation from the wireless telephone; and registering the wirelesstelephone for wireless services within the roaming service area.
 26. Themethod of claim 25, further comprising notifying a home wireless serviceprovider for the wireless telephone of the registration of the wirelesstelephone for wireless services within the roaming service area.
 27. Themethod of claim 26, wherein notifying a home wireless service providerfor the wireless telephone of the registration of the wireless telephonefor wireless services within the roaming service area includesinstructing the home wireless service provider for the wirelesstelephone that all calls directed to a permanent telephone number of thewireless telephone be forwarded directly to a pseudo-telephone numberassigned to the wireless telephone number for operation in the roamingservice area.
 28. The method of claim 25, further comprising: afterregistering the wireless telephone for wireless services within theroaming service area, receiving a call from the wireless telephone;determining whether the wireless telephone is registered to place callswithin the roaming service area; determining whether the call isauthorized; and if the wireless telephone is registered to place callswithin the roaming service area and if the call is authorized, thencompleting the call.
 29. A system of enabling use of a wirelesstelephone in a roaming service area using prepaid services, comprising:a switch operative to query a home location register for registrationinformation on the wireless telephone; the home location registeroperative to determine the wireless telephone is not registered forwireless services in the roaming service area; to register the wirelesstelephone for wireless services within the roaming service area; and aprepaid services system operative to receive account information forprepaid wireless services from the wireless telephone; to register thewireless telephone for prepaid wireless services within the roamingarea.
 30. The system of claim 29, wherein the home location register isfurther operative to notify a home wireless service provider for thewireless telephone of the registration of the wireless telephone forwireless services within the roaming service area.
 31. The system ofclaim 29, wherein the switch is further operative to receive a call fromthe wireless telephone after the wireless telephone is registered forwireless services within the roaming area; to determine whether thewireless telephone is registered to place calls within the roamingservice area; to determine from the prepaid services system whether thecall is authorized; and to complete the call if the wireless telephoneis registered to place calls within the roaming service area and if thecall is an authorized call.
 32. A computer readable medium having storedthereon computer-executable instructions for causing a computer toperform a method of enabling use of a wireless telephone in a roamingservice area using prepaid services, the method comprising: receiving acall from the wireless telephone in the roaming service area;determining the wireless telephone is not registered for wirelessservices in the roaming service area; designating the wireless telephoneas an invalid subscriber for wireless services in the roaming servicearea; receiving account information for prepaid roaming services fromthe wireless telephone; and registering the wireless telephone forwireless services within the roaming service area.
 33. The computerreadable medium of claim 32, wherein the method further comprises:assigning the wireless telephone a pseudo-telephone number afterreceiving account information for prepaid roaming services from thewireless telephone.
 34. The computer readable medium of claim 32,wherein receiving account information for prepaid roaming services fromthe wireless telephone includes receiving prepaid wireless air time froma prepaid calling card input into the wireless telephone.
 35. Thecomputer readable medium of claim 32, wherein receiving accountinformation for prepaid roaming services from the wireless telephoneincludes receiving prepaid account balance from a prepaid calling cardinput into the wireless telephone.
 36. The computer readable medium ofclaim 32, wherein registering the wireless telephone for wirelessservices within the roaming service area, further comprises: registeringidentification information for the wireless telephone with a homelocation register; and registering identification information for thewireless telephone with a prepaid services system.
 37. The computerreadable medium of claim 32, wherein the method further comprisesnotifying a home wireless service provider for the wireless telephone ofthe registration of the wireless telephone for wireless services withinthe roaming service area.
 38. The computer readable medium of claim 32,wherein the method further comprises: after registering the wirelesstelephone for wireless services within the roaming service area,receiving a call from the wireless telephone; determining whether thecall is a prepaid call; determining whether the call is authorized; andif the call is an authorized prepaid call, completing the call.
 39. Thecomputer readable medium of claim 38, wherein determining whether thecall is authorized includes determining whether the account informationfor prepaid roaming services contains a sufficient prepaid servicesbalance for completing the call.
 40. The computer readable medium ofclaim 32, wherein the method further comprises un-registering thewireless telephone for roaming services within the roaming service areaafter the wireless telephone is removed from the roaming service area.41. The computer readable medium of claim 32, wherein determining thewireless telephone is not registered for wireless services within theroaming service area further comprises querying a home location registerwithin the roaming service area for registration information for thewireless telephone.
 42. The computer readable medium of claim 32,wherein the method further comprises providing prepaid roaming servicesoptions to the wireless telephone prior to receiving account informationfor prepaid roaming services from the wireless telephone.
 43. Thecomputer readable medium of claim 42, wherein the method furthercomprises: providing information for obtaining prepaid roaming services;and providing instructions for inputting prepaid roaming servicesaccount information into the wireless telephone.
 44. A computer readablemedium having stored thereon computer-executable instructions forcausing a computer to perform a method of enabling use of a wirelesstelephone in a roaming service area using prepaid services, the methodcomprising: receiving at a wireless switch a call from the wirelesstelephone in the roaming service area; determining at a home locationregister that the wireless telephone is not registered for wirelessservices in the roaming service area; designating the wireless telephoneas an invalid subscriber for wireless services in the roaming servicearea; receiving prepaid roaming services account information from entryof a prepaid calling card at the wireless telephone; assigning thewireless telephone a pseudo-telephone number for temporary roamingservices operation in the roaming services area; and registering thewireless telephone at the home location register and at a prepaidservices system for wireless services within the roaming service area.